Supporting assembly, battery roll core and battery

Abstract

The utility model discloses a supporting assembly, a battery roll core and a battery, which are used for solving the technical problem that in the hot-pressing shaping process of the existing battery roll core, the inner side bending part of the battery roll core is easy to cause powder falling or breakage of a pole piece at the bending part due to lack of support. The supporting assembly disclosed by the utility model is specifically inserted into the middle part of a battery roll core so as to effectively support the bent part of the inner side of the battery roll core when the battery roll core is subjected to hot-pressing shaping, and specifically comprises a supporting block, the supporting block is provided with a first supporting part and a second supporting part which are oppositely arranged, the first side edge of the first supporting part is connected with the first side edge of the second supporting part, and the second side edge of the first supporting part is connected with the second side edge of the second supporting part; the first supporting part and the second supporting part are both made of elastic materials, and the first supporting part and the second supporting part form arched structures which are far away from each other.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery design technical field especially relates to a support subassembly, battery roll core and battery. BACKGROUND

[0002] Battery roll core as the core component inside the battery, it is generally through the positive pole piece, diaphragm and negative pole piece winding.

[0003] The battery roll core after winding is relatively fluffy, therefore needs to use hot pressing to reshape, and the pole piece of battery roll core will occur to fold in the hot pressing reshaping process, leads to the pole piece of 1-5 circles of the inside bending of battery roll core and easily occurs the condition of dropping or breaking, this will lead to the electron transmission of battery roll core is limited, increases the battery internal resistance and thus influences the battery performance.

[0004] Therefore, finding a kind of technical scheme that can solve the above technical problems becomes the important subject of the research of the person skilled in the art. UTILITY MODEL CONTENT

[0005] The utility model embodiment discloses a support subassembly, battery roll core and battery for solving the technical problem that the inside bending of existing battery roll core in hot pressing reshaping process is easily led to the pole piece of bending due to lack of support and appears the technology problem such as dropping or breaking.

[0006] The utility model provides a kind of support subassembly, including support block;

[0007] The support block has the first support part and the second support part being oppositely arranged and structurally identical, the first support part has the first side and the second side being oppositely arranged, the second support part has the first side and the second side being oppositely arranged, wherein the first side of the first support part is connected with the first side of the second support part, and the second side of the first support part is connected with the second side of the second support part;

[0008] The first support part (and the second support part are all elastic materials, and the first support part and the second support part form mutually away arch structure.

[0009] Optionally, the support block further has the first support side strip and the second support side strip;

[0010] The first side of the first support part and the first side of the second support part are connected with the first support side strip;

[0011] The second side of the first support part and the second side of the second support part are connected with the second support side strip.

[0012] Optionally, the outer side of the first support side strip and the outer side of the second support side strip are arc surfaces.

[0013] Optionally, the support assembly further comprises a liquid absorption structure for absorbing electrolyte, and the first support part is provided with the liquid absorption structure away from the surface of the second support part and / or the second support part is provided with the liquid absorption structure away from the surface of the first support part.

[0014] Optionally, the support assembly further comprises a liquid absorption structure for absorbing electrolyte, and the first support part and / or the second support part is provided with a through hole or a groove.

[0015] The through hole or the groove is provided with the liquid absorption structure.

[0016] Optionally, the liquid absorption structure is a liquid absorption sponge.

[0017] Optionally, the support block is an integral structure.

[0018] The utility model provides a kind of battery roll core, the battery roll core is wound by positive pole piece, diaphragm and negative pole piece, wherein, the middle part of the battery roll core is provided with above-mentioned support assembly;

[0019] The first support part and the second support part of the support assembly are in abutment with the inner side wall of the battery roll core.

[0020] Optionally, the width of the battery roll core when being pressed is A, and the length of the battery roll core when being pressed is B;The width of the support block when being pressed is a, and the length of the support block when being pressed is b.

[0021] Wherein, a≥A, b≥B.

[0022] The utility model provides a kind of battery, comprising above-mentioned battery roll core.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] The support assembly of the embodiment is specifically inserted into the middle part of the battery roll core, wherein, when the battery roll core is not pressed, the first support part is arched towards the direction away from the second support part to abut against one inner side surface of the battery roll core, and the second support part is arched towards the direction away from the first support part to abut against the other inner side surface of the battery roll core, so as to avoid the support assembly from falling off the battery roll core. When the battery roll core is hot-pressed and shaped, the support block is also pressed in the thickness direction thereof, at this time, the first support part is attached to the second support part, and the first support part extends towards the first side edge and the second side edge thereof to support one bending part of the battery roll core, and the second support part extends towards the first side edge and the second side edge thereof to support the other bending part of the battery roll core. Through the above design, the inner side bending parts of the battery roll core can be effectively supported during the hot-pressing and shaping of the battery roll core, the inner side tab of the battery roll core is prevented from falling off or being broken during the hot-pressing and shaping of the battery roll core, the performance of the battery roll core is ensured, and the production quality of the battery is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 A structural schematic view of a support assembly provided by the embodiment of the present application when not being pressed;

[0027] Figure 2 Another angle structural schematic view of a support assembly provided by the embodiment of the present application when not being pressed;

[0028] Figure 3 A structural schematic view of a battery roll core provided by the embodiment of the present application when not being pressed after being inserted into the support assembly;

[0029] Figure 4 A structural schematic view of a support assembly provided by the embodiment of the present application when being pressed;

[0030] Figure 5 A structural schematic view of a battery roll core provided by the embodiment of the present application when being pressed;

[0031] Figure 6 A structural schematic view of a battery roll core provided by the embodiment of the present application when being pressed after being inserted into the support assembly;

[0032] Figure 7Another angle structure schematic view of a battery roll core provided by the utility model embodiment when being pressed after being inserted into the supporting assembly is shown in the figure.

[0033] Illustration: support block 1;First support part 101;Second support part 102;First support side strip 103;Second support side strip 104;Mounting through slot 105;Liquid suction structure 2;Battery roll core 3;Hollow structure 301;Bend 302. DETAILED DESCRIPTION

[0034] The utility model discloses a kind of supporting assembly, battery roll core and battery, for solving the technical problem that the inner side bend of battery roll core is easily caused to appear the powder drop or break of pole piece of bend due to lack of support in the heat-pressing shaping process of existing battery roll core.

[0035] In order to make the personnel of this technical field better understand the utility model scheme, the utility model is further explained in detail below in combination with drawings and specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0036] Please refer to Figures 1 to 7 The utility model embodiment provides a kind of supporting assembly, including support block 1;

[0037] The support block 1 has the first support part 101 and the second support part 102 being oppositely arranged and structurally identical, the first support part 101 has the first side and the second side being oppositely arranged, the second support part 102 has the first side and the second side being oppositely arranged, as shown in Figure 1 The first side and the second side of the first support part 101 are both shorter side of its length, i.e. the width edge of the first support part 101, similarly, the first side and the second side of the second support part 102 are both shorter side of its length, i.e. the width edge of the second support part 102;

[0038] The first side of the first support part 101 is connected with the first side of the second support part 102, and the second side of the first support part 101 is connected with the second side of the second support part 102.

[0039] The first support part 101 and the second support part 102 are both elastic material (for example, rubber, silica gel, etc.), and the first support part 101 and the second support part 102 form the arch structure away from each other.

[0040] As Figure 1As shown, when the support block 1 is not compressed, the first support part 101 arches away from the second support part 102, and the second support part 102 arches away from the first support part 101.

[0041] As shown, when the support block 1 is not compressed, the first support part 101 arches away from the second support part 102, and the second support part 102 arches away from the first support part 101. Figure 4 As shown, when the support block 1 is not compressed, the first support part 101 arches away from the second support part 102, and the second support part 102 arches away from the first support part 101.

[0042] It should be noted that the support block 1 in the embodiment is preferably made of a material with insulation, elasticity and electrolyte corrosion resistance, such as insulating rubber or silicone.

[0043] The support assembly of the embodiment is specifically inserted into the middle part of the battery roll core 3, wherein, as shown, Figure 3 when the battery roll core 3 is not compressed, the first support part 101 arches away from the second support part 102 to abut against one inner side of the battery roll core 3, and the second support part 102 arches away from the first support part 101 to abut against the other inner side of the battery roll core 3, thereby avoiding the support assembly from falling off the battery roll core 3. As shown, Figure 6 and Figure 7 when the battery roll core 3 is hot-pressed and shaped, the support block 1 is also compressed in the thickness direction, at this time, the first support part 101 is attached to the second support part 102, and the first support part 101 extends to the first side edge and the second side edge thereof to support one bending part of the battery roll core 3, and the second support part 102 extends to the first side edge and the second side edge thereof to support the other bending part of the battery roll core 3, through the above design, the inner side bending parts of the battery roll core 3 can be effectively supported during the hot-pressing and shaping of the battery roll core 3, and the inner side tab of the battery roll core 3 is prevented from falling off or breaking during the hot-pressing and shaping of the battery roll core 3, thereby ensuring the performance of the battery roll core 3 and improving the production quality of the battery.

[0044] Further, as shown, Figure 1 the support block 1 in the embodiment also has a first support side strip 103 and a second support side strip 104;

[0045] the first side edge of the first support part 101 and the first side edge of the second support part 102 are connected with the first support side strip 103;

[0046] the second side edge of the first support part 101 and the second side edge of the second support part 102 are connected with the second support side strip 104;

[0047] The width of the first support part 101 and the width of the second support part 102 are the same as the length of the first support side strip 103, and the length of the second support side strip 104 is the same as the length of the first support side strip 103.

[0048] It should be noted that, through the above design, when the support block 1 is pressed in the thickness direction thereof, the first support part 101 is attached to the second support part 102, and the first support part 101 extends outward, and the second support part 102 extends outward, thereby driving the first support side strip 103 to support one of the inner side bending parts of the battery roll core 3 and driving the second support side strip 104 to support the other inner side bending part. In addition, the design of the first support side strip 103 and the second support side strip 104 can increase the effective area of the first support part 101 and the second support part 102 in contact with the inner side bending parts of the battery roll core 3, thereby providing better support effect. Figure 7 As shown in the drawings, when the support block 1 is pressed in the thickness direction thereof, the first support part 101 is attached to the second support part 102, and the first support part 101 extends outward, and the second support part 102 extends outward, thereby driving the first support side strip 103 to support one of the inner side bending parts of the battery roll core 3 and driving the second support side strip 104 to support the other inner side bending part. In addition, the design of the first support side strip 103 and the second support side strip 104 can increase the effective area of the first support part 101 and the second support part 102 in contact with the inner side bending parts of the battery roll core 3, thereby providing better support effect.

[0049] Specifically, the outer side surface of the first support side strip 103 and the outer side surface of the second support side strip 104 in the embodiment are circular arc surfaces.

[0050] It should be noted that the design of the circular arc surface can better fit the inner side bending parts of the battery roll core 3.

[0051] Further, as shown in the drawings, the support assembly in the embodiment further comprises a liquid absorbing structure 2 for absorbing electrolyte, wherein the liquid absorbing structure 2 has various setting forms. Figure 2

[0052] In one specific embodiment, the surface of the first support part 101 away from the second support part 102 and / or the surface of the second support part 102 away from the first support part 101 is provided with the liquid absorbing structure 2.

[0053] It should be noted that in this design, the liquid absorbing structure 2 is bonded to the surface of the entire first support part 101 and / or the second support part 102 by an adhesive or the like.

[0054] In another specific embodiment, the support assembly further comprises a liquid absorbing structure 2 for absorbing electrolyte, and the first support part 101 and / or the second support part 102 is provided with a through hole or groove 105.

[0055] The through hole or groove 105 is provided with the liquid absorbing structure 2.

[0056] It should be noted that in this design, the liquid absorbing structure 2 can be multiple and distributed in the through hole or groove 105 of the first support part 101 and the second support part 102 as needed.

[0057] ​By the above design, when the battery roll core 3 is placed into the battery shell and electrolyte is added, the liquid absorption structure 2 can absorb a certain amount of electrolyte, and when the electrolyte is lost during the use of the battery, the liquid absorption structure 2 can gradually release the electrolyte. In addition, the liquid absorption structure 2 can be compressed at the same time, which can not only supplement the electrolyte for the battery, but also reserve space for the expansion of the pole piece of the battery roll core 3.

[0058] Specifically, the liquid absorption structure 2 in the embodiment is a liquid absorption sponge.

[0059] Further, in order to improve the integrity and connection stability of the support block 1 in the embodiment, the support block 1 in the embodiment is preferably an integrally formed structure.

[0060] Please refer to Figures 1 to 7 The battery roll core 3 in the embodiment of the utility model is wound by a positive pole piece, a diaphragm and a negative pole piece, and a hollow structure is formed in the middle of the battery roll core after winding. The hollow structure is provided with a support assembly as described above.

[0061] The first support part 101 and the second support part 102 of the support assembly are in abutment with the inner side wall of the battery roll core 3.

[0062] When the battery roll core 3 is compressed and causes the support block 1 to be compressed in the thickness direction, the first support part 101 is attached to the second support part 102, and the first support part 101 extends outward to support the bent part of the battery roll core 3, and the second support part 102 extends outward to support the other bent part of the battery roll core 3.

[0063] It should be noted that through the above design, the inner side bent part of the battery roll core 3 can be effectively supported during the thermal compression shaping of the battery roll core 3, and the inner side pole piece of the battery roll core 3 is prevented from falling off or breaking during the thermal compression shaping of the battery roll core 3, which ensures the performance of the battery roll core 3 and is beneficial to improving the production quality of the battery.

[0064] Further, the width of the battery roll core 3 when compressed is A, and the length of the battery roll core 3 when compressed is B; the width of the support block 1 when compressed is a, and the length of the support block 1 when compressed is b.

[0065] Wherein, a≥A, b≥B.

[0066] It should be noted that through the above design, the support block 1 can closely contact the inner side bent part of the battery roll core 3 during thermal compression, thereby achieving better support effect.

[0067] Please refer to Figures 1 to 7The utility model embodiment provides a kind of battery, including above-mentioned battery roll core 3.

[0068] The hollow structure of the battery roll core 3 of the battery of the embodiment is inserted with the supporting assembly, through the above design, the inside bending part of the battery roll core 3 can be effectively supported in the hot-pressing shaping process of the battery roll core 3, to avoid the inside tab of the battery roll core 3 from falling powder or breaking in the hot-pressing shaping process of the battery roll core 3, to ensure the performance of the battery roll core 3, to improve the production quality of the battery.

[0069] The above provides a kind of supporting assembly, battery roll core and battery provided by the utility model are introduced in detail, for the general technical personnel of the field, according to the thought of the embodiment of the utility model, there will be changes in specific implementation and application range, and the above is described, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A support assembly, characterized by, The support block (1) comprises a first support part (101) and a second support part (102) arranged oppositely and identically, the first support part (101) has a first side edge and a second side edge arranged oppositely, the second support part (102) has a first side edge and a second side edge arranged oppositely, wherein the first side edge of the first support part (101) is connected with the first side edge of the second support part (102), and the second side edge of the first support part (101) is connected with the second side edge of the second support part (102). The first support part (101) and the second support part (102) are both made of elastic material, and the first support part (101) and the second support part (102) form an arch structure away from each other. The support block (1) further comprises a first support side strip (103) and a second support side strip (104).

2. The support assembly of claim 1, wherein, The first side edge of the first support part (101) and the first side edge of the second support part (102) are both connected with the first support side strip (103). The second side edge of the first support part (101) and the second side edge of the second support part (102) are both connected with the second support side strip (104). The outer side surface of the first support side strip (103) and the outer side surface of the second support side strip (104) are arc surfaces.

3. The support assembly of claim 2, wherein, The support assembly further comprises a liquid absorption structure (2) for absorbing electrolyte, and the surface of the first support part (101) away from the second support part (102) and / or the surface of the second support part (102) away from the first support part (101) is provided with the liquid absorption structure (2).

4. The support assembly of claim 1, wherein, The support assembly further comprises a liquid absorption structure (2) for absorbing electrolyte, and the first support part (101) and / or the second support part (102) is provided with a through hole or a groove (105).

5. The support assembly of claim 1, wherein, The through hole or the groove (105) is provided with the liquid absorption structure (2). The liquid absorption structure (2) is a liquid absorption sponge.

6. A support assembly according to claim 4 or 5, wherein, The support block (1) is an integral structure.

7. The support assembly of claim 1, wherein, The battery roll core (3) is provided with the support assembly according to any one of claims 1 to 7; 8. A battery jelly-roll, the battery jelly-roll (3) being wound by a positive electrode sheet, a separator, and a negative electrode sheet, characterized by, The first support part (101) and the second support part (102) of the support assembly are both in abutment with the inner side wall of the battery roll core (3). The width of the battery roll core (3) under pressure is A, the length of the battery roll core (3) under pressure is B, the width of the support block (1) under pressure is a, and the length of the support block (1) under pressure is b.

9. The battery roll core (3) according to claim 7, characterized in that Wherein, a≥A, b≥B. The battery roll core (3) comprises the battery roll core (3) according to any one of claims 8 to 9.

10. A battery, characterized by ​

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